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← ScienceWhich outcome arises when an attempt is made to run a Carnot heat engine at 100% efficiency?
A)Infinite energy input requirement✓
B)Reversible process violation halting operation
C)Isothermal expansion ceases completely
D)Adiabatic compression runs indefinitely
💡 Explanation
When a Carnot engine operates at 100% efficiency, energy input is equal to work output, requiring an infinitely large hot reservoir or infinitely slow heat transfer due to the Carnot efficiency equation relying on finite temperature difference between heat reservoirs. Therefore, infinite energy is required rather than a halting, cessation, or indefinite action which contravene defined parameters for the engine cycle.
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